Button对象表示一个可点击按钮，它会引发一个事件，所以可以在点击时执行某个动作。
A button object represents a clickable button, which raises an event, so you can perform an action upon a click.
如何执行一个与外部对象的一个按钮元件动作？
How to execute an action on a component with a button of an external object?
如何执行一个与外部对象的一个按钮元件动作？
How to execute an action on a component with a button of an external object?
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